Regenerative reversing-furnace.



L. L. KEOX. REGENERATIVE REVBRSING FURNACE APPLICATION FILED MAB-.10, 1909.

?atented Oct. 26, 1909.

m m m w 9 up .m n k W H 6 g. W M U om WITNESSES ANDREW. a. GRAHAM w. PHDYO-LXYHOGRAPRERS. WASEI'IIGYON. uv 1 L. L. KNOX.

REGENERATIVE REVEBSING FURNACE.

Arrmcnxon FILED MAR. 10. 1909.

Patented Oct. 26, 1909.

2 SKEETSSHEET 2.

wrrusssss ANDREW. B. GRAHAM 120., PHDHLUYHOGRAPHERi wlsnmmcn, u c.

UNITED STATES PATENT OFFICE.

LUTHER L. KNOX, 01? BEN AVON, PENNSYLVANIA, ASSIGNOB TO KEYSTONE FURNACE CONSTRUCTION COMPANY, OF PITTSBUBG, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

Specification of Letters Patent.

REGENERATIVE REVERSING-FURNACE.

Patented Oct. 26, 1909.

To all whom it may concern:

Be it known that I, LUTHER L. Knox, of Ben Avon, Allegheny county, Pennsylvania, have invented a new and useful Regenerative ReversingFurnace, of which the following is a full, clear, and exact description, reference being bad to the accompanying drawings, forming part of this specification, in which Figure 1 is a sectional elevation of one end portion of an open hearth furnace embodying my invention; Fig. 2 is an end View of the same; Fig. 3 is a view partly in end elevation, and partly in vertical section of the air port or twyer; and Fig. 4 is an end view of the gas port or twyer.

My invention has relation to regenerative reversing furnaces, and more particularly to an improved construction of the gas and air ports, whereby the destructive action of the hot air and gases is reduced to a minimum, and provision is made for the ready renewal and replacement of any desired portion of the port structure.

The nature of my invention will be best understood by reference to the accompanying drawings, in which I have shown the preferred embodiment thereof, and which will now be described, it being premised, however, that various changes may be made in the details of construction and arrange ment of the partswithout departing from the spirit and scope of my invention as defined in the appended claims.

In the drawings, the numeral 2 designates an open hearth furnace, which may be, in general, of any usual or desired type.

3 designates the gas up-talre, and a the air up-take at one end of the furnace. It will be understood that in practice a similar arrangement of the up-takes and of the port constructions hereinafter described will be provided at each end of the furnace. These gas and air up-takes are constructed separately from the body of the furnace and from each other, so as to be almost entirely surrounded by air, thereby giving a maximum air-cooling effect as well as permitting ready access to any desired part of the port structure for renewal or repairs. These ports are provided with the usual regenerator connections 5, and have each an extension 6 below the regenerator connections. These extensions are preferably providedwith the doors 7, and are open at their lower ends, being arranged to discharge into suitable slag pots or receptacles 8, which are detachably supported thereunder. In the construction shown, the lower ends of the extensions are provided with bolting flanges 9, and the pots or receptacles 8 are provided with similar bolting flanges 10 at their upper ends, whereby they may be secured to the flanges 9. In practice, however, any suit-able means may be employed for attaching the pots or receptacles to said extensions. I may also employ at the joints between the pots or receptacles and the eXtensions,watercooling rings or castings 11.

The air uptake 4; is preferably formed in two or more sections, the joints between such sections being preferably provided with hollow cooling boxes 12, as shown. The upper end of the air up-take is provided with a seat or support 13 for a longitudinally arched port 14, which connects the up-take with the furnace chamber. This port is formed in a plurality of sections, each of which consists of an outer metallic shell and inner refractory lining. The outer shell consists of a top section 15 having skew-baclrs 16 carrying a. refractory arch 17 of the port; the side portions or channels 18 and the bottom sections 19, as shown in Fig. 3. The top sections 1a are preferably provided with strengthening ribs 19, and at their ends have bolting flanges 20, whereby the sections may be detachably secured to each other. The upper end of the up-talre 3 is provided with a seat or support 21 for a removable port 22, which connects said up-take with the furnace chamber. This port is constructed in sections similar to the sections of the port 14, and is also arched longitudinally centrally underneath the arch of the port 1%. The inner or discharge end of the port 1; has a detachable water-cooled section 23, and the inner end of the port 22 has a similar section 24:. These sections are provided wit-h bolting flanges 25, by which they can be secured to the bolting flanges 20 of the body portions of the ports 20 and 22.

Each of the sections 23 and 2% is preferably constructed as shown in Figs. 3 and a; that is to say, it is composed, of a watercooled arched top casting 26, water-cooled side castings 27 and a water-cooled base casting 28, these castings having a refractory lining 29. The side castings 27 are formed with the beveled upper ends 30, which act as skew-backs for the top arch of refractory material. The base casting of the section 23 and the top casting of the section 24 are adjacent to each other, as shown, thus forming a double water-cooled jacket between the adjacent discharge end of the two sections where the need for protection is greatest.

The joints between each of these sections of the ports 14 and 22 are preferably provided with water-cooling rings or boxes 31, which are similar to the cooling rings or boxes 12 of the air up-take.

The regenerator connections 5 are preferably of a construction similar to that of the ports 14 and 22. That is to say, they are made in sections, each section consisting of an outer metallic shell and an inner refractory lining. The outer metallic shell of these connections is also preferably sectional, as shown in Figs. 1 and 2, the top portion 32 having skew-backs 33 for carrying the refractory top lining of the regenerator ports. The joints in these ports may be provided with cooling boxes 34 similar to the cooling boxes 12 and 31.

The side walls of the furnace 2 may be provided with vertically arranged cooling boxes 35, which extend from about the normal level of the charge in the furnace upwardly to a point just below the top skew-backs, as indicated in dotted lines in Fig. 1'. The door openings 36 in the charging side of the furnace are also preferably protected by the cooling arches 37 and the side cooling boxes 38, as also shown in dotted lines in Fig. 1. These boxes are removable from the outside of the furnace and extend only part way through the furnace wall, being protected by an inner lining of the refractory material.

The advantages of my invention result from the described construction and arrangement of the gas and air ports, whereby all portions of the same are readily accessible for renewal and for repairs; also from the sectional construction of the ports whereby any desired portion thereof may be readily removed and renewed. The arch form of the gas and air ports is also a feature of great advantage, since the hot gases and air sweep therethrough in a curved path and corners and angles in which the gases exert their most destructive action are obviated.

By providing the slag pots or receptacles 8 at the lower ends of the uptakes, I do away with the slag pockets usually employed, and simplify the construction of the furnace. I also greatly facilitate the removal of deposits, since, when one of the pots or receptacles becomes filled, it can be readily detached, removed and emptied.

By suspending the pots from the uptakes, I make the provision of a proper joint between the uptakes and the pots a simple matter. The pots close the lower ends of the uptakes and a clear space is left to permit a car to be run under the pots.

It will be obvious that various changes may be made in the details of construction and arrangement of the parts. Thus, both the gas and air ports can be constructed in any desired number of sections, these sections can be secured in various ways, the construction of the water-cooling means may be varied, and various other changes made.

What I claim is 1. In a regenerative reversing furnace, an air up-take constructed separately from the body of the furnace and widened transversely at its upper portion, and a longitudinally arched port connecting the up-take with the furnace chamber; substantially as described.

2. A regenerative reversing furnace having an air up-take, and a longitudinally and upwardly arched air port detachably supported on the upper end of the uptake and connecting the same with the furnace chamber'; substantially as described.

3. A regenerative reversing furnace having an air up-take, a longitudinally and transversely arched air port detachably supported on the upper end of the up-take and connecting the same with the furnace chamber; substantially as described.

4. A regenerative reversing furnace having air and gas up-takes constructed separately from the body of the furnace and from each other, and having longitudinally arched ports connecting them with the furnace chamber; substantially as described.

5. A regenerative reversing furnace having air and gas up-takes constructed separately from the body of the furnace and from each other, and having longitudinally arched ports connecting them with the furnace chamber, each of said ports being formed of a plurality of detachable sections; substantially as described.

6. In a regenerative reversing furnace, an uptake, and a port connecting the uptake with the furnace chamber, said port being constructed in a plurality of separate sections; substantially as described.

7. In a regenerative reversing furnace, an uptake, and a port connecting the up-take with the furnace chamber, said port being constructed in a plurality of separate sections, and water-cooling means interposed at the joints between said sections; substantially as described.

8. In a regenerative reversing furnace,

chamber, each of said ports being arched longitudinally, and the gas port being ar ranged underneath the arched air port; substantially as described.

9. A regenerative reversing furnace having an up-take constructed separately from the body of the furnace and provided with a regenerator connection, said connection being formed in detachable sections; substantially as described.

10. In a regenerative reversing furnace, an up-take leading to the furnace chamber and having a regenerator connection, said connection having a removable top portion or arch; substantially as described.

11. In a regenerative reversing furnace, an up-take having a regenerator connection leading to the furnace chamber, said up-take having a downward extension below the regenerator connection, and a slag pot or receptaele detachably supported by and suspended from said extension; substantially as described.

12. In a regenerative reversing furnace, an up-take leading to the furnace chamber and having a regenerator furnace connection, the uptake having a downward extension below the regenerator connection, and a removable slag pot or receptacle normally closing the open lower end of the extension and suspended therefrom; substantially as described.

13. In a regenerative reversing furnace, an up-take and a longitudinally and transversely arched port connecting the up-take with the furnace chamber, said port being formed in sections, each section consisting of an outer metallic shell and an inner refractory lining, the shell of each section being formed by separate side and bottom portions; substantially as described.

1 In a regenerative reversing furnace, an uptake open at its lower end, and a slag receptacle detachably suspended from the lower end portion of the uptake and normally closing the open end thereof; substantially as described.

15. In a regenerative reversing furnace, an uptake open at its lower end, and a slag receptacle detachably suspended from the lower end portion of the uptake and normally closing the open end thereof, and a cooling member interposed in the joint between the receptacle and the uptake; substantially as described.

16. A regenerative reversing furnace, having an air uptake, and an air port detachably supported on the uptake and connecting it with the furnace chamber, said port being of arched or elbow form, and having its inner walls continuously curved in the direction of the length of the port; substantially as described.

17 A regenerative reversing furnace, having an air uptake, and an air port detachably supported on the uptake and connecting it with the furnace chamber, said port being of arched or elbow form, and having its inner walls continuously curved in the direction of the length of the port, said port having a detachable end section extending into the furnace chamber; substantially as described.

18. A regenerative reversing furnace,having an air uptake, and an air port detachably supported on the uptake and connecting it with the furnace chamber, said port being of arched or elbow form, and having its inner walls continuously curved in the direction of the length of the port, said port having a detachable water cooled end section extending into the furnace chamber; substantially as described.

19. A regenerative reversing furnace,having an air uptake, and an air port detachably supported on the uptake and connecting it with the furnace chamber, said port being of arched or elbow form, and having its inner walls continuously curved in the direction of the length of the port, said port being constructed in a plurality of separate detachable sections; substantially as descrlbed.

20. In a regenerative reversing furnace, an uptake having a laterally closed, bottomless, extension below the bottom wall of the regenerator connection, and a receptacle detachably supported underneath and closing the lower end of said extension, substantially as described.

In testimony whereof, I have hereunto set my hand.

LUTHER L. KNOX. Witnesses:

H. M. CoRwIN, GEO. H. PARHELEE. 

